According to Missleworks, the RRC3 is good to 40K MSL, they have an Xtreme version good to 100K MSL. I like to run the RRC2L in combination with the RRC3, additionally I use the LCDT display unit to program both, very nice. You mention that most people don't use two flight computers, for me this has become a standard operating procedure, the redundancy just makes sense since the number one cause of failure is recovery. Also its more common to set your backup to deploy at Apogee + 2 or 3 seconds and main deploying at 100 ft lower than the primary. Also, I like to see those batteries with tie straps around them even though their in the holders, to insure they remain connected. Most Level 3 Cert projects don't exceed 30K ft so these devices are good choices. Just my 2 cents worth! Hope your Level 2 went well!

Both of those altimeters will work at altitudes of 10, 20, 30,000' and higher. A 'level three' rocket is any motor M, N, or O impulse. A 'class 3' rocket is one with a motor over O impulse (40,960 Nsec) requiring FAA/AST waiver. en.wikipedia.org/wiki/Model_rocket_motor_classification